305086.fig.004a
(a)
305086.fig.004b
(b)
305086.fig.004c
(c)
305086.fig.004d
(d)
Figure 4: Histopathological examination by H&E staining. Striking differences were observed in lung histology between the two experimental groups. Marked lung hemorrhage, edema, alveolar septal thickening, influx of inflammatory cells, and fibrin deposition were observed in rats injected with paraquat alone. In contrast, in PQ  +  HW group, the lung damage was alleviated, suggesting hydrogen water protected paraquat-induced acute lung injury.